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Showing 1–12 of 12 results
Advanced filters: Author: R Kirchmair Clear advanced filters
  • The question of whether quantum phenomena can be explained by classical models with hidden variables is the subject of a long-lasting debate. One feature of classical models that is thought to be in conflict with quantum mechanics is non-contextuality, with experiments undertaken with photons and neutrons seeming to support this. However, these tests required the generation of special quantum states and left various loopholes open. Here an experiment is performed with trapped ions that overcomes these problems and cannot be explained in non-contextual terms.

    • G. Kirchmair
    • F. Zähringer
    • C. F. Roos
    Research
    Nature
    Volume: 460, P: 494-497
  • An artificial Kerr medium has been engineered using superconducting circuits, enabling the observation of the characteristic collapse and revival of a coherent state; this behaviour could, for example, be used in single-photon generation and quantum logic operations.

    • Gerhard Kirchmair
    • Brian Vlastakis
    • R. J. Schoelkopf
    Research
    Nature
    Volume: 495, P: 205-209
  • Epstein-Barr virus causes lymphoma. Here the authors describe a direct complex of the viral oncoprotein LMP1 with the cellular TRAF6 protein as a critical virus-host interface for lymphoma survival and validate this complex as a potential therapeutic target.

    • Fabian Giehler
    • Michael S. Ostertag
    • Arnd Kieser
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-18
  • The Dirac equation successfully merges quantum mechanics with special relativity. It predicts some peculiar effects such as 'Zitterbewegung', an unexpected quivering motion of a free relativistic quantum particle. This and other predicted phenomena are key fundamental examples for understanding relativistic quantum effects, but are difficult to observe in real particles. Here, using a single trapped ion set to behave as a free relativistic quantum particle, a quantum simulation of the one-dimensional Dirac equation is demonstrated.

    • R. Gerritsma
    • G. Kirchmair
    • C. F. Roos
    Research
    Nature
    Volume: 463, P: 68-71
  • Realising deep-strong coupling phenomena for interacting light-matter systems remains an experimental challenge. Here, Langford et al. employ a circuit quantum electrodynamics chip with moderate coupling between a resonator and transmon qubit to realise digital quantum simulation of deep-strong coupling dynamics.

    • N. K. Langford
    • R. Sagastizabal
    • L. DiCarlo
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-10
  • The quantized changes in the photon number parity of a microwave cavity can be tracked on a short enough timescale, and with sufficiently little interference with the quantum state, for this parity observable to be used to monitor the occurrence of error in a recently proposed protected quantum memory.

    • L. Sun
    • A. Petrenko
    • R. J. Schoelkopf
    Research
    Nature
    Volume: 511, P: 444-448
  • Recent advances in quantum information transfer by photons are reviewed. The theoretical framework for information transfer between nodes of a quantum network is described, and several key experiments for remote atom–atom entanglement mediated by light are illustrated. The prospects for hybrid systems currently in development are also discussed.

    • T. E. Northup
    • R. Blatt
    Reviews
    Nature Photonics
    Volume: 8, P: 356-363